Burlington, WY 82411 Frost Dates
When can you plant in Burlington, WY?
Around 05/12 is the usual last spring frost, about 257 days away. The first fall frost typically arrives around 09/28, about 136 frost-free days later.
Burlington sits in USDA Zone 5a (-20 to -15°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
About 4 weeks of growing season left in Burlington before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Burlington's last frost
05/12 is the middle of 30 years of NOAA records, not a promise. Plant by 04/30 and you're betting against frost in roughly 9 years out of 10. 05/27 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Burlington compares
Burlington's growing season runs about 136 days, ranking 37,778 of 40,283 US ZIP codes measured here, longest to shortest. Within WY, it ranks 44 of 192.
Learn more
zone vs. frost date covers why Zone 5a and Burlington's frost date answer different questions. the frost range covers how to read the range around Burlington's dates instead of trusting one.